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Recovery of Mercury from Cinnabar Ores by Electrooxidation.

Scheiner BJ; Lindstrom RE; Shanks DE
NTIS: PB 221 900 :14 pages
The Bureau of Mines investigated an electrolytic technique for oxidizing ore slurried with brine to determine its effectiveness in extracting mercury from ores. Optimization experiments conducted on a 2.5-Pound-mercury-per-ton ore resulted in 95 percent mercury extraction with operating conditions of 30 deg c, a current density of 0.5 Ampere per square inch, and a treatment time of 3.5 Hours. Corresponding power consumption amounted to 38 kilowatt-hours per ton of ore treated. Amenability experiments conducted on 62 different mercury ores resulted in 90 to 99 percent mercury dissolution from ores containing 0.6 to 20 pounds of mercury per ton of ore. Treatment time ranged from 1 to 7 hours in 4- to 20-percent sodium chloride solutions, and power consumption was in the range of 10 to 50 kilowatt-hours per ton of ore. Pilot mill experiments in a 100- to 200-pound-per-hour extraction plant have been in progress to quantify power and reagent requirements. These data will be reported in a subsequent publication.
Publication Date
Document Type
IH; Report of Investigation;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
RI 7750
NIOSH Division
Source Name
NTIS: PB 221 900
Page last reviewed: December 10, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division